This is the sequel to All Systems Red. Murderbot left its guardian (a gentler way of saying owner), and is pretending to be a human. It meets a system named ART. At first Murderbot distrusts ART but they eventually become friends. Murderbot wants and needs to find out about its past, and to get to a certain area ART convinces it to take on a temporary job as a security consultant. The interaction between Murderbot and ART was so much fun to read and the few action scenes were well-written. I really adore Murderbot and really excited to read more of this series. :)